Replacing The Thermostat: Finishing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Volvo S80, 2005 Volvo S80, 2004 Volvo S80, 2003 Volvo S80, and 2002 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.
Remove the hose clip.
Fill with coolant.
Install the cap on the expansion tank.
Test drive the engine until the thermostat has opened.
Check for leakage.
Top up the coolant and oil if necessary.